Subversion Repositories openrisc_2011-10-31

/*  task1.c
 *
 *  This set of three tasks do some simple task switching for about
 *  15 seconds and then call a routine to "blow the stack".
 *
 *  COPYRIGHT (c) 1989-1999.
 *  On-Line Applications Research Corporation (OAR).
 *
 *  The license and distribution terms for this file may be
 *  found in the file LICENSE in this distribution or at
 *  http://www.OARcorp.com/rtems/license.html.
 *
 *  $Id: blow.c,v 1.2 2001-09-27 12:02:13 chris Exp $
 */
 
#include <rtems.h>
 
void b() {}
 
void blow_stack( void )
{
  volatile unsigned32 *low, *high;
  unsigned char *area;
 
b();
  /*
   *  Destroy the first and last 16 bytes of our stack... Hope it
   *  does not cause problems :)
   */
 
 area = (unsigned char *)_Thread_Executing->Start.Initial_stack.area;
 
 low  = (volatile unsigned32 *) (area + HEAP_OVERHEAD);
 high = (volatile unsigned32 *)
            (area + _Thread_Executing->Start.Initial_stack.size - 16);
 
 
 low[0] = 0x11111111;
 low[1] = 0x22222222;
 low[2] = 0x33333333;
 low[3] = 0x44444444;
 
 high[0] = 0x55555555;
 high[1] = 0x66666666;
 high[2] = 0x77777777;
 high[3] = 0x88888888;
 
}